I find it incrediblely ironic that you chose the Sigillum Dei Aemeth as the symbol for necronomicon when its one of the holiest symbols in christianity and one of the few that actually works when it comes to protecting against demons because it has the names of several arch-angels and a couple different names for god XD

Fun fact: Putting the cross upside down does not mean it's an inversion (and thus evil), it's a form of showing reverence or respect, which is why the Pope has this: [link]

It's a common false belief that inverting any Christian symbol makes it a Satanic one, but it's especially funny if you confront someone that got an inverted cross tattoo because they thought having a Satanic symbol on the body makes them cool and edgy.